""ET TROJAN Lyceum Golang HTTP Backdoor Connectivity Check""

SID: 2035957

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_14, deployment Perimeter, signature_severity Major, tag Backdoor, updated_at 2022_04_14

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/GO/"

  • Value: ".php"

  • Value: "Accept-Encoding|3a 20|*|0d|"

  • Value: "Content-Length|3a 20|0|0d|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

  • http_header

source